from flask import current_app, jsonify
from flask import g
from flask import render_template
from flask import request
from flask import session

from info import constants
from info import redis_store
from info.models import User, News, Category
from info.utils.common import user_login_data
from info.utils.response_code import RET
from . import index_blu


@index_blu.route('/')
@user_login_data
def index():
    user = g.user
    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(6)
    except Exception as e:

        current_app.logger.error(e)

    click_news_list =[]

    for news in news_list if news_list else []:
        click_news_list.append(news.to_basic_dict())

        # 获取新闻分类数据
    categories = Category.query.all()
    # 定义列表保存分类数据
    categories_dicts = []

    for category in categories:
        # 拼接内容
        categories_dicts.append(category.to_dict())

    return render_template('news/index.html', data={"user_info": user.to_dict() if user else None,
                                                    "click_news_list": click_news_list,
                                                    "categories": categories_dicts
                                                    })

@index_blu.route('/news_list')
def get_news_list():
    """
       获取指定分类的新闻列表
       1. 获取参数
       2. 校验参数
       3. 查询数据
       4. 返回数据
       :return:
       """
    # 1. 获取参数
    args_dict = request.args
    page = args_dict.get("page", '1')
    per_page = args_dict.get("per_page", constants.HOME_PAGE_MAX_NEWS)
    category_id = args_dict.get("cid", '1')
    # 2. 校验参数
    try:
        page = int(page)
        per_page = int(per_page)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
        # 3. 查询数据并分页
    filters = [News.status == 0]
    # 如果分类id不为1，那么添加分类id的过滤
    if category_id != "1":
        filters.append(News.category_id == category_id)
    try:
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page, per_page, False)
        # 获取查询出来的数据
        items = paginate.items
        # 获取到总页数
        total_page = paginate.pages
        current_page = paginate.page
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询失败")

    news_li = []
    for news in items:
        news_li.append(news.to_basic_dict())

    data ={'totalPage':total_page,
           'currentPage':current_page,
           'newsList':news_li,
           'cid':category_id}

    # 4. 返回数据
    return jsonify(errno=RET.OK, errmsg="OK", data =data)



# send_static_file flask 自带访问静态文件的方法
@index_blu.route('/favicon.ico')
def favicon():
    return current_app.send_static_file('news/favicon.ico')